998995903 has 2 divisors, whose sum is σ = 998995904. Its totient is φ = 998995902.

The previous prime is 998995891. The next prime is 998995931. The reversal of 998995903 is 309599899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998995903 - 2⁹ = 998995391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998993903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499497951 + 499497952.

It is an arithmetic number, because the mean of its divisors is an integer number (499497952).

Almost surely, 2^998995903 is an apocalyptic number.

998995903 is a deficient number, since it is larger than the sum of its proper divisors (1).

998995903 is an equidigital number, since it uses as much as digits as its factorization.

998995903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7085880, while the sum is 61.

The square root of 998995903 is about 31606.8964468200. The cubic root of 998995903 is about 999.6651889140.

The spelling of 998995903 in words is "nine hundred ninety-eight million, nine hundred ninety-five thousand, nine hundred three".